What causes swelling and pain in the thumb?

Aug 12, 2024 Source: Cainiu Health
Disease description:

The thumb suddenly became swollen, not red, and slightly painful. What is the cause of thumb swelling and pain?

Doctor's answer (1)
Dr. Chen Jian

Swelling and pain in the thumb is a common symptom that may be caused by various factors:

1. Traumatic injury: This is one of the most common causes. Falls, collisions, crush injuries, or even minor sprains can lead to thumb swelling and pain. In such cases, the patient may have a clear history of trauma.

2. Infection: Skin infections or cellulitis may also cause swelling and pain.

3. Arthritis: Such as rheumatoid arthritis and osteoarthritis, which can cause joint swelling, pain, and stiffness.

4. Tendinitis: Overuse of the thumb, such as prolonged mobile phone use or typing, can lead to tendinitis, presenting as localized pain, swelling, and limited mobility.

5. Gout: Hyperuricemia leads to deposition of urate crystals in the joints, causing acute arthritis. The thumb is one of the most common initial sites.

6. Nerve lesions: Such as compression of the ulnar or median nerve. Although it does not directly cause swelling and pain, it may be accompanied by symptoms such as numbness and tingling.